Full flat-bed seats are now the Benchmark standard for long haul Business class airline travel, and for travellers wanting to get the best sleep during the flight this should be the product type that you seek out.

Angled-flat seats are still provided by quite a lot of airlines, and whilst they claim that with the incline of an aircraft inflight the seats will not feel angled, the reality is that these seats can be uncomfortable for sleeping.

Many passengers report that they slowly slide down the angled seat, and that proper rest is hard to come by.